Nano Banana Pro is Google’s most advanced image-generation and editing model, built on Gemini 3 Pro. It extends the original Nano Banana with significantly improved multimodal reasoning, real-world grounding, and...
Model details →Google: Nano Banana Pro (Gemini 3 Pro Image) vs OpenAI: GPT-5.1 Chat
Google: Nano Banana Pro (Gemini 3 Pro Image) and OpenAI: GPT-5.1 Chat are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
GPT-5.1 Chat (AKA Instant is the fast, lightweight member of the 5.1 family, optimized for low-latency chat while retaining strong general intelligence. It uses adaptive reasoning to selectively “think” on harder queries, improving accuracy…
Model details →Side-by-side comparison
| Capability | Google: Nano Banana Pro (Gemini 3 Pro Image) | OpenAI: GPT-5.1 Chat | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 131K | 128K | 🏆 Google: Nano Banana Pro (Gemini 3 Pro Image) |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $2.00 | $1.25 | 🏆 OpenAI: GPT-5.1 Chat |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $12.00 | $10.00 | 🏆 OpenAI: GPT-5.1 Chat |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | — | 🏆 Google: Nano Banana Pro (Gemini 3 Pro Image) |
Frequently asked questions
Is Google: Nano Banana Pro (Gemini 3 Pro Image) better than OpenAI: GPT-5.1 Chat?
Google: Nano Banana Pro (Gemini 3 Pro Image) and OpenAI: GPT-5.1 Chat are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
What's the price difference between Google: Nano Banana Pro (Gemini 3 Pro Image) and OpenAI: GPT-5.1 Chat?
Input: $2.00 vs $1.25 per 1M tokens. Output: $12.00 vs $10.00 per 1M tokens.
What context windows do Google: Nano Banana Pro (Gemini 3 Pro Image) and OpenAI: GPT-5.1 Chat support?
Google: Nano Banana Pro (Gemini 3 Pro Image) supports up to 131K tokens. OpenAI: GPT-5.1 Chat supports up to 128K tokens.
Do both Google: Nano Banana Pro (Gemini 3 Pro Image) and OpenAI: GPT-5.1 Chat support tool calling?
Google: Nano Banana Pro (Gemini 3 Pro Image): yes. OpenAI: GPT-5.1 Chat: yes.
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